双条杉天牛研究初报  

Researches on Biological Characters of Semanotus bifasciatus

作　　者：严文斌[1] 

机构地区：[1]东至县林业局,尧渡247200

出　　处：《安徽农业大学学报》2003年第1期57-60,共4页Journal of Anhui Agricultural University

摘　　要：双条杉天牛是柏类树种的重要害虫之一。该虫在安徽1a发生1代,以成虫在树枝干蛹室内蛰伏越冬。翌年2月中旬后,越冬成虫陆续咬破树皮爬出羽化孔相继交尾、产卵。3月中、下旬为幼虫孵化盛期,幼虫于9月中旬后化蛹,9月下旬至10月上、中旬成虫陆续羽化,就此蛰伏越冬,该虫不需补充营养,可多次交尾,平均每雌产卵(68.84±32.75)粒,幼虫在寄主皮下取食韧皮部及边材,从而切断寄主输导组织,引起死亡。The investigation on the biological characters of Semanotus bifasciatus showed that the pest completes its life cycle in one year in Anhui area. The imago overwinter in stems and starts to come out of the emergence holes by bitting the bark in the mid and late February of the next year.The largest hatching rate appear in late March,and the larva begin to pupate after the middle September.In the late September to the early or mid October,the pupa begin to emerge, then the imago hide in the trunks to over winter. When the imago come out of the emergence holes, they eat nothing and mate repeatedly.Each mated female can lay (6884±3175) eggs. Semanotus bifasciatus damges trees in its larval stage. The pupa hide in the subcutis of the host plant and damage the transport nutrient by eating the phloem. This is the reason why the invaded plants die.

关 键 词：双条杉天牛 生物学特性 柏类树木害虫 形态特征 

分 类 号：S763.38[农业科学—森林保护学] S763.71[农业科学—林学]